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为了考察阻力预测的准确性,评估挂架/吊舱引起的阻力增量,分析网格和转捩对阻力及阻力增量的影响,采用不同密度网格,对DLR-F6翼/身和翼/身/挂/舱组合体跨声速流场进行了全湍流和固定转捩2种方式的数值模拟.翼/身和翼/身/挂/舱组合体均得到了网格收敛性结果,机翼表面和吊舱表面压力分布与实验数据吻合良好.预测的阻力增量高出实验数据0.000 3,优于其他软件的结果.网格细分对壁面压力分布影响较小,对阻力尤其是压差阻力影响较大;相对于全湍流,转捩对阻力尤其是摩擦阻力影响较大,对挂架/吊舱引起的阻力增量几乎没有影响.
In order to investigate the accuracy of resistance prediction, evaluate the increment of resistance caused by pylons / pods, and analyze the influence of grid and transition on the resistance and resistance increment, / Body / hang / cabin combination of transonic flow field of turbulent and fixed turbulence in two ways of numerical simulation.Wings / body and wing / body / hang / cabin combination have been the grid convergence results, the machine The pressure distribution on wing surface and pod surface is in good agreement with the experimental data, and the predicted increase of resistance is higher than the experimental data of 0.0003, which is better than the results of other software.The mesh subdivision has little influence on wall pressure distribution, The differential resistance has a great effect on the resistance. In contrast to the full turbulence, the rotation has a great influence on the resistance, especially the frictional resistance, and has almost no effect on the resistance increase caused by the pylons / pods.